| 摘要 |
The present invention relates to a mould of the type including three plates, characterised in that it comprises, in the second plate (200), at least one conduit which extends perpendicularly to the parting line (202) between the second plate (200) and the third plate (300) and which emerges, on the one hand, into a transverse channel (220) formed level with the parting line (104) between the first and second plates (100, 200) and connected to a main injection channel (102) and, on the other hand, into a mould cavity (310), as well as a piston (700) which can move translationally in the conduit (250). <IMAGE>
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